Stridulating Passalid vs Delta Green Ground Beetle
Side-by-side species comparison
| Attribute | Stridulating Passalid | Delta Green Ground Beetle |
|---|---|---|
| Scientific Name | Passalus punctatostriatus | Elaphrus viridis |
| Order | Coleoptera | Coleoptera |
| Family | Passalidae | Carabidae |
| Size | 30-42 mm | 0.6-0.8 cm |
| Habitat | Woodlands | Wetlands |
| Diet | Wood Feeders | Predators |
| Regions | Central America, South America | United States |
| Conservation | Least Concern | Endangered |
Stridulating Passalid
A large, shiny black bess beetle with prominently punctate-striate elytra and strong mandibles. It lives in family groups within decaying logs. Known for producing a wide repertoire of stridulatory sounds for communication.
Did You Know?
Adults produce sounds by rubbing specialized ridges on the abdomen against the underside of the wings, creating at least 14 distinct calls.
Delta Green Ground Beetle
A small metallic green ground beetle found only near vernal pools in Solano County, California. It is threatened by urban development and habitat loss.
Did You Know?
It is one of the rarest beetles in North America, known from fewer than five locations.